Add NEWS for 5.3.4alpha.
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XZ Utils Release Notes
======================
+5.3.4alpha (2022-11-15)
+
+ * All fixes from 5.2.7 and 5.2.8.
+
+ * liblzma:
+
+ - Minor improvements to the threaded decoder.
+
+ - Added CRC64 implementation that uses SSSE3, SSE4.1, and CLMUL
+ instructions on 32/64-bit x86 and E2K. On 32-bit x86 it's
+ not enabled unless --disable-assembler is used but then
+ the non-CLMUL code might be slower. Processor support is
+ detected at runtime so this is built by default on x86-64
+ and E2K. On these platforms, if compiler flags indicate
+ unconditional CLMUL support (-msse4.1 -mpclmul) then the
+ generic version is not built, making liblzma 8-9 KiB smaller
+ compared to having both versions included.
+
+ With extremely compressible files this can make decompression
+ up to twice as fast but with typical files 5 % improvement
+ is a more realistic expectation.
+
+ The CLMUL version is slower than the generic version with
+ tiny inputs (especially at 1-8 bytes per call, but up to
+ 16 bytes). In normal use in xz this doesn't matter at all.
+
+ - Added an experimental ARM64 filter. This is *not* the final
+ version! Files created with this experimental version won't
+ be supported in the future versions! The filter design is
+ a compromise where improving one use case makes some other
+ cases worse.
+
+ - Added decompression support for the .lz (lzip) file format
+ version 0 and the original unextended version 1. See the
+ API docs of lzma_lzip_decoder() for details. Also
+ lzma_auto_decoder() supports .lz files.
+
+ - Building with --disable-threads --enable-small
+ is now thread-safe if the compiler supports
+ __attribute__((__constructor__))
+
+ * xz:
+
+ - Added support for OpenBSD's pledge(2) as a sandboxing method.
+
+ - Don't mention endianness for ARM and ARM-Thumb filters in
+ --long-help. The filters only work for little endian
+ instruction encoding but modern ARM processors using
+ big endian data access still use little endian
+ instruction encoding. So the help text was misleading.
+ In contrast, the PowerPC filter is only for big endian
+ 32/64-bit PowerPC code. Little endian PowerPC would need
+ a separate filter.
+
+ - Added --experimental-arm64. This will be renamed once the
+ filter is finished. Files created with this experimental
+ filter will not be supported in the future!
+
+ - Added new fields to the output of xz --robot --info-memory.
+
+ - Added decompression support for the .lz (lzip) file format
+ version 0 and the original unextended version 1. It is
+ autodetected by default. See also the option --format on
+ the xz man page.
+
+ * Scripts now support the .lz format using xz.
+
+ * Build systems:
+
+ - New #defines in config.h: HAVE_ENCODER_ARM64,
+ HAVE_DECODER_ARM64, HAVE_LZIP_DECODER, HAVE_CPUID_H,
+ HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR, HAVE_USABLE_CLMUL
+
+ - New configure options: --disable-clmul-crc,
+ --disable-microlzma, --disable-lzip-decoder, and
+ 'pledge' is now an option in --enable-sandbox (but
+ it's autodetected by default anyway).
+
+ - INSTALL was updated to document the new configure options.
+
+ - PACKAGERS now lists also --disable-microlzma and
+ --disable-lzip-decoder as configure options that must
+ not be used in builds for non-embedded use.
+
+ * Tests:
+
+ - Fix some of the tests so that they skip instead of fail if
+ certain features have been disabled with configure options.
+ It's still not perfect.
+
+ - Other improvements to tests.
+
+ * Updated translations: Croatian, Finnish, Hungarian, Polish,
+ Romanian, Spanish, Swedish, and Ukrainian.
+
+
5.3.3alpha (2022-08-22)
* All fixes from 5.2.6.
